Product classification
① Padlock: straight, blade, copper head
② U-lock: for bicycles, electric vehicles, motorcycles, glass doors
③ Steel wire lock: car, key, password, length can be customized
④ Door lock: gear lock, external door lock, internal door lock
⑤ Smart lock: smart padlock, smart plug-in lock, smart drawer lock, smart door lock
⑥ Lock accessories: padlock cylinder, lock cylinder, steel wire rope, key, copper sleeve and iron sleeve